关键词: 混合励磁同步发电机, 流体场, 温度场, 计算流体力学

Abstract: In order to further reduce the impact of motor performance limited by temperature rise, a cooling system combining casing water cooling and annular water cooling disc was proposed for a staggered pole hybrid excitation synchronous generator. Based on the theory of computational fluid dynamics ( CFD) and heat transfer, a three-dimensional fluid field and temperature field model was established to analyse the heat dissipation performance of the three water-cooling discs, namely, single water channel, double water channel and adding spoiler, under the same inlet flow rate, and the wall thickness of the water-cooling discs and the angle between adjacent spoiler were optimised. The temperature field simulation of the optimised cooling scheme was carried out to obtain the temperature rise of each component of the motor. Compared with the traditional casing spiral waterway structure, the simulation results show that the addition of the water-cooling disc structure can effectively reduce the temperature rise of each part of the generator and improve the cooling and heat dissipation capacity of the generator.

Key words: hybrid excitation synchronous generator, fluid field, temperature field, computational fluid dynamics( CFD)